28124997 has 16 divisors (see below), whose sum is σ = 39587520. Its totient is φ = 17712000.

The previous prime is 28124989. The next prime is 28125001. The reversal of 28124997 is 79942182.

28124997 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 28124997 - 2³ = 28124989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28124917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33847 + ... + 34667.

It is an arithmetic number, because the mean of its divisors is an integer number (2474220).

Almost surely, 2^28124997 is an apocalyptic number.

It is an amenable number.

28124997 is a deficient number, since it is larger than the sum of its proper divisors (11462523).

28124997 is a wasteful number, since it uses less digits than its factorization.

28124997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444.

The product of its digits is 72576, while the sum is 42.

The square root of 28124997 is about 5303.3005760564. The cubic root of 28124997 is about 304.1100889659.

The spelling of 28124997 in words is "twenty-eight million, one hundred twenty-four thousand, nine hundred ninety-seven".